4.4.0-104.127) is not available, but a newer one is (4.4.0-142.168). We redirected you there.
/usr/lib/linux-tools/3.13.0-155-lowlatency/perf is in linux-tools-3.13.0-155-lowlatency 3.13.0-155.205.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/linux-tools/3.13.0-155-lowlatency/../../linux-tools-3.13.0-155/perf